package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.enumeration.OperationType;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImp implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    
    @Autowired
    private SetmealDishMapper setmealDishMapper;


    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表插入数据
        dishMapper.insert(dish);
        Long dishId = dish.getId();
        //向口味表插入数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0){
            flavors.forEach(i->{
                i.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //开始分页查询
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page =  dishMapper.pageQuery(dishPageQueryDTO);
        long total = page.getTotal();
        List<DishVO> dish = page.getResult();
        return new PageResult(total,dish);
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBacth(List<Long> ids) {
        //判断当前菜品是否能够删除--是否存在起售菜品
        for (Long id : ids){
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus()== StatusConstant.ENABLE){
                //当前菜品处于起售中不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断菜品是否被套餐关联了
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishId(ids);
        if (setmealIds!=null && setmealIds.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

/*        for (Long id : ids){
            //删除菜品表中的数据
            dishMapper.deleteById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }*/

        //根据id批量删除菜品数据
        dishMapper.deleteByIds(ids);

        //根据id批量删除菜品关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);

    }

    /**
     * 根据id查询菜品和对应的口味数据
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据id查询口味数据
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);
        //组装DishVO并返回
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(flavors);

        return dishVO;
    }

    /**
     * 修改菜品
     *
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //更新dish表中数据
        dishMapper.update(dish);
        //更新口味表中数据--先删除再新增
        List<DishFlavor> flavors = dishDTO.getFlavors();
        //删除口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //插入新口味
        if (flavors != null && flavors.size() > 0){
            flavors.forEach(i->{
                i.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品起售、停售
     *
     * @param dish
     */
    @Override
    public void updateStatus(Dish dish) {
        dishMapper.update(dish);
        Integer status = dish.getStatus();
        Long dishId = dish.getId();
        List<Long> dishIds = new ArrayList<>();
        dishIds.add(dishId);
        if (status == StatusConstant.DISABLE){
            //将套餐改为停售状态
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishId(dishIds);
            if (setmealIds != null && setmealIds.size()>0){
                for (Long id : setmealIds){
                    Setmeal setmeal = Setmeal.builder()
                            .id(id)
                            .status(StatusConstant.ENABLE)
                            .build();
                    setmealDishMapper.update(setmeal);
                }
            }

        }

    }

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId) {
        List<Dish> dishList =dishMapper.getByCategoryId(categoryId);
        return dishList;
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
